These subchassis upgrades use a laminated end grain Balsa construction.
End grain Balsa consists of rectangles of Balsa wood bonded together so
that the grain structure of the wood is in the direction of compressive
forces in the structure. When laminated between multiple layers of
carbon fibre cloth infused with epoxy resin it forms a very rigid light
weight structure. Four layers of twill weave carbon cloth are laminated
onto each side. In order to provide absolute rigidity and to follow the
original specifications of most turntable subchassis, two carbon
horizontal spines run the length of the inside of the subchassis. These
spines are bonded to the top and bottom carbon skins. This further
increases the performance of the subchassis. The bearing area has a further three layers of carbon fibre to provide reinforcement.
The bearing mounting surface is machined level in a CNC mill at the end of the manufacturing process. This ensures that the platter will run parallel with the arm board so you can level your turntable effectively.
The original pressed steel
subchassis tends to resonate whilst the carbon fibre, end
grain balsa design is inert. This means increased damping of motor
vibrations and bearing noise from the platter. The replacement
subchassis weighs roughly half of the original allowing a greater
proportion of the sprung mass to belong to the gyroscopic action of the
platter. This enables your turntable suspension to be more responsive in
doing its job of isolating the platter and arm from external vibration.
Includes screw fixing kit for standard armboard.
Thankyou.
Official description -
These subchassis upgrades use a laminated end grain Balsa construction.
End grain Balsa consists of rectangles of Balsa wood bonded together so
that the grain structure of the wood is in the direction of compressive
forces in the structure. When laminated between multiple layers of
carbon fibre cloth infused with epoxy resin it forms a very rigid light
weight structure. Four layers of twill weave carbon cloth are laminated
onto each side.
The benefits of a light weight sub-chassis have
been known for some time yet some designs seem to ignore these benefits
offering heavy high mass designs. The lightweight sub-chassis allows the
springs to respond to external vibration more rapidly instead of them
being overloaded by a heavy structure. This enables you to keep the mass
where it belongs, in the gyroscopic action of the platter. Less weight
overhanging into the armboard support brings the sub-chassis closer to
the ideal of a pure triangular design reducing the loading on the
springs to maintain a balance. It all makes sense when you give it some
thought !
In order to provide absolute rigidity and to follow the
original specifications of most turntable subchassis, two carbon
horizontal spines run the length of the inside of the subchassis. These
spines are bonded to the top and bottom carbon skins. This further
increases the performance of the subchassis. The original pressed steel
subchassis rings like a bell sonically whilst the carbon fibre, end
grain balsa design is inert. This means increased damping of motor
vibrations and bearing noise from the platter. The replacement
subchassis weighs roughly half of the original allowing a greater
proportion of the sprung mass to belong to the gyroscopic action of the
platter. This enables your turntable suspension to be more responsive in
doing its job of isolating the turntable from external vibration.
More info at - www.fidelitydesignsltd.co.uk